Remove unused keyed store "force generic".

R=ishell@chromium.org

Review URL: https://chromiumcodereview.appspot.com/73893003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17827 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove keyed load "force generic" miss case.
BUG=
R=ishell@chromium.org

Review URL: https://chromiumcodereview.appspot.com/68213024

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17828 ce2b1a6d-e550-0410-aec6-3dcde31c8c00